WD-40 Specialist Rust Remover Soak  One Gallon [4-Pack] Dissolves rust and restores old metal orparts. This non-toxic soak made with biodegradable ingredients helps make old metal look new again without scraping, chipping, or scrubbing. Get your tough job done right WD-40 Specialist line is designed with industrial-strength quality and extreme penetration for your hard to solve issues Safely and effectively removes rust without acids or caustic chemicals. It is 50-state VOC compliant and NSF Category P1 Ideal for use on auto restoration, tractors, antiques, farm equipment & implements, trailers & hitches, and rusty tools WD-40 Company has been around for over 65 years and has never stopped their innovative mindset. The WD-40 Specialist lubricant line has been refined to perfection so you get the results you need with ease